Delete MacVDA from the codebase since it is dead code and not being worked on.

ui/gfx/video_decode_acceleration_support_mac.h

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef UI_GFX_VIDEO_DECODE_ACCELERATION_SUPPORT_MAC_H_
-#define UI_GFX_VIDEO_DECODE_ACCELERATION_SUPPORT_MAC_H_
-
-#include <CoreFoundation/CoreFoundation.h>
-#include <CoreVideo/CoreVideo.h>
-#include <map>
-
-#include <VideoDecodeAcceleration/VDADecoder.h>
-
-#include "base/basictypes.h"
-#include "base/callback.h"
-#include "base/gtest_prod_util.h"
-#include "base/memory/ref_counted.h"
-#include "base/message_loop/message_loop_proxy.h"
-#include "ui/base/ui_export.h"
-
-class FrameCallbackUtil;
-class VideoDecodeAccelerationSupportTest;
-
-namespace gfx {
-
-// This Mac OS X-specific class provides dynamically linked access to
-// VideoDecodeAcceleration.framework, which is only available on 10.6 and later.
-class UI_EXPORT VideoDecodeAccelerationSupport
-    : public base::RefCountedThreadSafe<VideoDecodeAccelerationSupport> {
- public:
-  enum Status {
-    SUCCESS = 0,
-    LOAD_FRAMEWORK_ERROR,
-    HARDWARE_NOT_SUPPORTED_ERROR,
-    OTHER_ERROR,
-  };
-
-  typedef base::Callback<void(CVImageBufferRef, int status)> FrameReadyCallback;
-
-  VideoDecodeAccelerationSupport();
-
-  // Calls the create function.
-  Status Create(int width, int height,
-                int pixel_format,
-                const void* avc_bytes, size_t avc_size);
-
-  // Calls the decode function with the given data. |cb| is invoked once the
-  // frame has been decoded.
-  Status Decode(const void* bytes, size_t size, const FrameReadyCallback& cb);
-
-  // Calls the flush function. If |emit_frames| is true then all pending frames
-  // are synchronoulsy decoded, otherwise the pending frames are discarded.
-  Status Flush(bool emit_frames);
-
-  // Calls the destory function.
-  Status Destroy();
-
- private:
-  friend class base::RefCountedThreadSafe<VideoDecodeAccelerationSupport>;
-  FRIEND_TEST_ALL_PREFIXES(VideoDecodeAccelerationSupportTest, Callback);
-
-  ~VideoDecodeAccelerationSupport();
-
-  static void OnFrameReadyCallback(void* callback_data,
-                                   CFDictionaryRef frame_info,
-                                   OSStatus status,
-                                   uint32_t flags,
-                                   CVImageBufferRef image_buffer);
-  void OnFrameReady(CVImageBufferRef image_buffer,
-                    OSStatus status,
-                    int frame_id);
-
-  // Reference to the VDA decoder.
-  VDADecoder decoder_;
-
-  // A monotonically increasing number. This is used to assign a unique ID for
-  // decode frame request.
-  int frame_id_count_;
-
-  // Maps a unique ID to the callback given to the decode function.
-  std::map<int, FrameReadyCallback> frame_ready_callbacks_;
-
-  // A reference to the message loop that this object was created on. This is
-  // used to invoke the frame ready callback on the correct thread.
-  scoped_refptr<base::MessageLoopProxy> loop_;
-
-  DISALLOW_COPY_AND_ASSIGN(VideoDecodeAccelerationSupport);
-};
-
-}  // namespace gfx
-
-#endif  // UI_GFX_VIDEO_DECODE_ACCELERATION_SUPPORT_MAC_H_